Discovery kicks off its run of six new episodes of Man vs. Wild on Monday at 9 p.m. with a special guest star: Source Code actor Jake Gyllenhaal. And they’ve just released a quick sneak peek of his time with the extreme survival show’s star, Bear Grylls.

The movie star spent two days with Grylls and Discovery’s cameras among Iceland’s mountains, huge glaciers, and active volcanoes.

Apparently, he matched Grylls’ every move. And in order to cope with the harsh conditions, we hear Gyllenhaal occasionally takes the lead. We can’t imagine what this will do to the actor’s insurance premium.